> To facilitate the trades, they used “créditos,” the club’s own currency, printed onto white paper. Why not just use dollars? Or in general, why doesn't a store open that sells everything in dollars? What will they do with dollars? Pay their employees in dollars!

I would imagine that government employees, who must get paid in pesos would quickly exchange all their money in the black market for dollars. Everyone else would just use dollars. So why isn't that the case?